Rocky Marciano was the size of today's cruiserweights and would've knocked out today's HWs.

Jack Dempsey, again a small guy who would've beat the **** out of today's HWs.

It's not about size it's about fighting ability, and these guys could fight.

well put, theres a reason all the supposedly new star in the heavyweight are getting exposed left and right when they step up, it;s because they rely on one thing which is usually power and when they step up vs a guy who can fight they get exposed.